Global Patent Index - EP 0816824 B1

EP 0816824 B1 2001-04-04 - Method of monitoring and controlling yield stress in rheologically plastic fluid

Title (en)

Method of monitoring and controlling yield stress in rheologically plastic fluid

Title (de)

Verfahren zum Überwachen und Regeln der Fliessgrenzspannung einer rheologisch-plastischen Flüssigkeit

Title (fr)

Méthode de contrôle et de régulation de la limite d'écoulement d'un fluide rhéologiquement plastique

Publication

EP 0816824 B1 (EN)

Application

EP 97110705 A

Priority

US 67601896 A

Abstract (en)

[origin: US5652376A] The yield stress of rheologically plastic fluids such as coatings, sealants, and personal care lotions, determines their tendency to flow at low gravitational stress. Yield Stress is the apparent threshold stress above which flow is observed on an arbitrary time scale. An on-line technique to monitor yield stress during processing was developed, and can be used in controlling the slump or non-slump behavior of such products. A residual stress, after a flow excursion returns to zero shear rate, is related to yield stress. This residual stress can be used for process monitoring. It is measured from the residual pressure or torque after a controlled strain rheometer reaches zero strain rate.

IPC 1-7 (main, further and additional classification)

G01N 11/08

IPC 8 full level (invention and additional information)

G01L 1/00 (2006.01); G01N 11/00 (2006.01); G01N 11/04 (2006.01); G01N 11/08 (2006.01); G01N 33/44 (2006.01)

CPC (invention and additional information)

G01N 11/08 (2013.01)

Designated contracting state (EPC)

BE DE FR GB

EPO simple patent family

US 5652376 A 19970729; AU 2845297 A 19980115; AU 711991 B2 19991028; CA 2209104 A1 19980105; CN 1175686 A 19980311; DE 69704460 D1 20010510; DE 69704460 T2 20020328; EP 0816824 A2 19980107; EP 0816824 A3 19980923; EP 0816824 B1 20010404; JP H1082728 A 19980331; TW 382062 B 20000211

INPADOC legal status


2003-05-02 [REG FR ST] NOTIFICATION OF LAPSE

2003-03-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Owner name: *DOW CORNING CORP.

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2001-05-11 [ET] FR: TRANSLATION FILED

2001-05-10 [REF] CORRESPONDS TO:

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